How does an electromagnet work?
A. When an insulated wire is wrapped around an iron rod, the rod becomes magnetized
B. When electric current flows through the wire wrapped around an iron core
C. An electromagnet behaves like magnet only when the wire is wrapped around an iron core
D. An electromagnet maintains its magnetic properties even without the source of electricity.
Answers & Comments
Answer:
A.
Explanation:
A. When an insulated wire is wrapped around an iron rod, the rod becomes magnetized.
Answer:
Letter a
Explanation: